1. Coma Science Group, GIGA-Consciousness, University of Liege, Liege, Belgium
2. Centre du Cerveau, University Hospital of Liege, Liege, Belgium
3. Post-Coma Unit and Neurorehabilitation, IRCCS Fondazione Santa Lucia, Rome, Italy
4. Centre Hospitalier Neurologique William Lennox, Ottignies-Louvain-la-Neuve, Belgium